PHP Tutorial - PHP base_convert() Function
Definition
We can use base_convert() to convert binary directly to hexadecimal, or octal to duodecimal (base 12) or hexadecimal to vigesimal (base 20).
Syntax
PHP base_convert() function's format is as follows.
string base_convert ( string num, int from_base , int to_base ) Parameter
base_convert() takes three parameters:
a number to convert,the base to convert from, andthe base to convert to.
Return
The return value is the number converted to the specified base. The return type is String.
Example 1
For example, the following two lines are identical:
<?PHP
print decbin(16);
print base_convert("16", 10, 2);
?>
base_convert("16", 10, 2) is saying "convert the number 16
from base 10 to
base 2.
The highest base that base_convert() supports is base 36, which uses 0?9 and then A?Z. If you try to use a base larger than 36, you will get an error.
The code above generates the following result.
Example 2
Convert a hexadecimal number to octal number:
<?php
$hex = "E196";
echo base_convert($hex,16,8);
?>
The code above generates the following result.
Example 3
Convert an octal number to a decimal number:
<?php
$oct = "0031";
echo base_convert($oct,8,10);
?>
The code above generates the following result.
Example 4
Convert an octal number to a hexadecimal number:
<?php
$oct = "364";
echo base_convert($oct,8,16);
?>
The code above generates the following result.
